[keycloak-user] X509 Registration Flow

[Justin Williams]

Hello,

I currently have Keycloak (5.0.0) configured to use X.509 client
certificate authentication. However I have not been able to figure out a
good way to handle the registration flow. What I would like to happen is
have the `username` field on the registration form automatically populated
with the certificate CN. Is there a way to handle this out of the box, or
do I need to write a custom authentication SPI?

Thanks,
Justin W.